Jesse Vollmar, 25

Cofounder, FarmLogsVollmar grew up on his family's fifth-generation farm in Michigan and started a successful IT consulting business with classmate Brad Koch while still in high school. In January 2012, they launched FarmLogs to fill a tech void for farmers. The software helps farmers manage risk while monitoring crops, expenses, profits, weather and prices. The web and mobile apps are now in use by commercial farms in 50 states and 121 countries.